Publications

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the functional anatomy of the hindlimb of some african viverridae (carnivora).the functional anatomy of the hindlimb of 12 species of viverrids was studied with relation to locomotion. the animals were allocated to primary locomotor categories on the basis of their anatomy and locomotion. the climbing, arboreal walking category (nandinia binotata) is characterized by a small sacroiliac articulation, the iliopsoas inserts onto a medially located lesser trochanter and the femoral condyles are not posteriorly placed. the hindfoot is plantigrade and its structure permits cons ...19761255730
prey capture, feeding techniques, and their ontogeny in the african dwarf mongoose, helogale undulata rufula. 19734788924
the ancestral carnivore karyotype (2n = 38) lives today in ringtails.chromosome painting was used to investigate the conservation of high-resolution longitudinal 4',6-diamidino-2-phenylindole (dapi)/g bands in carnivore chromosomes. cat (felis catus) and raccoon dog (nyctereutes procyonoides) painting probes were hybridized to the ringtail (bassaricus astutus), dwarf mongoose (helogale parvula), and malagasy civet (fossa fossa) to identify homologous chromosome elements. the patterns of chromosome segment homology among carnivore species allowed us to reconstruct ...200818339652
lipid components in anal scent sacs of three mongoose species (helogale parvula, crossarchus obscurus, suricata suricatta).anal sac secretions of three social mongoose species (helogale parvula, crossarchus obscurus, andsuricata suricatta) were chemically analyzed by means of gas chromatography-mass spectrometry. compounds with high molecular weights (greater than 250) were found to distinguish the three species. differences in composition suggest a possible species-specific role in scent marking. maleh. parvula had vitamin e present in the anal sac, whereas it was absent in the females. this suggests a possible sex ...199224254283
characterization of livestock-associated methicillin-resistant staphylococcus aureus cc398 and mecc-positive cc130 from zoo animals in the united kingdom.little is known about the characteristics and diseases associated with methicillin-resistant staphylococcus aureus (mrsa) in nondomestic animals. four presumptive mrsa isolates, obtained from clinical (n = 3) and surveillance specimens (n = 1) from dwarf (helogale parvula) and yellow mongooses (cynictis penicillata) from a united kingdom zoo, were analyzed by pcr for detection of meca and mecc-mediated methicillin resistance, and virulence genes. isolates were genotyped by multilocus sequence ty ...201728783429
a preliminary survey of medium and large-sized mammals from lebu natural protected forest, southwest showa, ethiopia.this study was conducted to determine the species composition and diversity of medium and large-sized mammals from lebu natural protected forest, ethiopia. surveys were conducted to record mammals through direct observation and indirect evidence from three habitat types, namely: natural forest, bushland, and riverine forest. a total of 15 mammalian species were recorded. the species recorded were papio anubis, chlorocebus aethiops, tragelaphus scriptus, canis aureus, crocuta crocuta, panthera pa ...201931832163
reduced social-information provision by immigrants and use by residents following dispersal.greater access to social information is a proposed benefit of group living [1]. however, individuals vary in the quantity and quality of information they provide [2], and prior knowledge about signaller reliability is likely important when receivers decide how to respond [3]. while dispersal causes regular changes in group membership [4], no experimental work has investigated social-information provision and use in this context. we studied sentinel behaviour following immigration in a habituated ...201729207265
experimental evidence for delayed contingent cooperation among wild dwarf mongooses.many animals participate in biological markets, with strong evidence existing for immediate cooperative trades. in particular, grooming is often exchanged for itself or other commodities, such as coalitionary support or access to food and mates. more contentious is the possibility that nonhuman animals can rely on memories of recent events, providing contingent cooperation even when there is a temporal delay between two cooperative acts. here we provide experimental evidence of delayed cross-com ...201829844179
experimental field evidence that out-group threats influence within-group behavior.in social species, conspecific outsiders present various threats to groups and their members. these out-group threats are predicted to affect subsequent within-group interactions (e.g., affiliation and aggression) and individual behavior (e.g., foraging and vigilance decisions). however, experimental investigations of such consequences are rare, especially in natural conditions. we used field-based call playbacks and fecal presentations on habituated wild dwarf mongooses (helogale parvula)-a coo ...202031579132
dwarf mongoose alarm calls: investigating a complex non-human animal call.communication plays a vital role in the social lives of many species and varies greatly in complexity. one possible way to increase communicative complexity is by combining signals into longer sequences, which has been proposed as a mechanism allowing species with a limited repertoire to increase their communicative output. in mammals, most studies on combinatoriality have focused on vocal communication in non-human primates. here, we investigated a potential combination of alarm calls in the dw ...202032962548
camera trap and questionnaire dataset on ecosystem services provided by small carnivores in agro-ecosystems in south africa.this dataset includes data derived from camera trap surveys and questionnaire surveys relating to small carnivores in agro-ecosystems in the vhembe biosphere reserve, south africa. the data were collected as part of the study "predation by small mammalian carnivores in rural agro-ecosystems: an undervalued ecosystem service?" (williams et al., 2017a) [1]. camera trap locations were stratified by land use: settlement, crops, and grazing areas. the camera trap data provide an insight into the ecol ...201829900232
[a case of self mutilation in a dwarf mongoose]. 19725065217
marking behaviour and its social significance in the african dwarf mongoose, helogale undulata rufula. 19734781185
invalid care in the dwarf mongoose (helogale undulata rufula)the responses of a captive family group of 12 dwarf mongooses (4 female and 8 male) towards a sick group member were recorded daily for 3 h over a 38 day period (until the animal died), these data being compared with those for a comparable control period. changes in feeding rank order, resting site, resting duration and grooming frequency and duration were found, these being to the advantage of the sick individual. the probable adaptive significance of such behaviour is discussed.19761014935
spontaneous lactation is an adaptive result of pseudopregnancy.lactation is almost exclusively associated with pregnancy and giving birth. although lactation can be induced without a preceding pregnancy in some species, this requires exogenous hormones, artificially intense or extended suckling or both. spontaneous lactation, lactation by females that have neither been pregnant nor experimentally manipulated, is extremely unusual among eutherians. among nondomesticated animals, spontaneous lactation has been observed repeatedly only in the dwarf mongoose he ...19912052092
aggression, reproduction, and androgens in wild dwarf mongooses: a test of the challenge hypothesis. 199319426013
dominance, reproduction and survival in banded mongooses: towards an egalitarian social system?the banded mongoose, mungos mungo, is a social species that forms multimale and multifemale family groups. earlier studies suggest these family groups are relatively egalitarian with small differences in reproductive opportunities among individuals of different rank. in contrast, previous studies of other social mongooses have focused on species with more despotic control of reproduction (meerkats, suricata suricatta, dwarf mongooses, helogale parvula). in these species, the distribution of repr ...200111170693
purification, crystallization and preliminary crystallographic studies of haemoglobin from mongoose (helogale parvula) in two different crystal forms induced by ph variation.haemoglobin (hb) is a respiratory pigment; it is a tetrameric protein that ferries oxygen from the lungs to tissues and transports carbon dioxide on the return journey. the oxygen affinity of haemoglobin is regulated by the concentration of oxygen surrounding it and several efforts have revealed the shapes of hb in different states and with different functions. however, study of the molecular basis of hbs from low-oxygen-affinity species is critically needed in order to increase the understandin ...201323385751
anthropogenic noise disrupts use of vocal information about predation risk.anthropogenic noise is rapidly becoming a universal environmental feature. while the impacts of such additional noise on avian sexual signals are well documented, our understanding of its effect in other terrestrial taxa, on other vocalisations, and on receivers is more limited. little is known, for example, about the influence of anthropogenic noise on responses to vocalisations relating to predation risk, despite the potential fitness consequences. we use playback experiments to investigate th ...201627595178
cross-modal impacts of anthropogenic noise on information use.anthropogenic noise is a global pollutant, and there is rapidly accumulating evidence of impacts on a range of animal taxa [1,2]. while many studies have considered how additional noise may affect information provision and use, they have focused on the masking and consequent alteration of acoustic signals and cues; so-called unimodal effects [3]. using field-based experimental trials on habituated wild dwarf mongooses (helogale parvula) [4], we combine sound playbacks and faecal presentations to ...201627780055
social-bond strength influences vocally mediated recruitment to mobbing.strong social bonds form between individuals in many group-living species, and these relationships can have important fitness benefits. when responding to vocalizations produced by groupmates, receivers are expected to adjust their behaviour depending on the nature of the bond they share with the signaller. here we investigate whether the strength of the signaller-receiver social bond affects response to calls that attract others to help mob a predator. using field-based playback experiments on ...201627903776
anthropogenic noise alters dwarf mongoose responses to heterospecific alarm calls.anthropogenic noise is an evolutionarily novel and widespread pollutant in both terrestrial and aquatic habitats. despite increasing evidence that the additional noise generated by human activities can affect vocal communication, the majority of research has focused on the use of conspecific acoustic information, especially sexual signals. many animals are known to eavesdrop on the alarm calls produced by other species, enhancing their likelihood of avoiding predation, but how this use of hetero ...201728153414
the presence of an avian co-forager reduces vigilance in a cooperative mammal.many animals must trade-off anti-predator vigilance with other behaviours. some species facilitate predator detection by joining mixed-species foraging parties and 'eavesdropping' on the predator warnings given by other taxa. such use of heterospecific warnings presumably reduces the likelihood of predation, but it is unclear whether it also provides wider benefits, by allowing individuals to reduce their own vigilance. we examine whether the presence of an avian co-forager, the fork-tailed dron ...201020129949
isolation and characterization of flagellates from rodents and canids in masinga, machakos district, kenya.a total of 728 animals comprising of 633 rodents and 95 canids were examined for leishmanial parasites. flagellates were isolated from 67 out of 111 (60.4%) acomys subspinosus (spiny mouse), 12 out of 143 (8.4% ) mastomys natalensis (multimammate rat), 2 out of 50 (4.0%) lemniscomys striatus (striped mouse), 2 out of 6 (33.3%) herpestes sanguineus (slender mongoose), 1 of 1 helogale parvula (dwarf mongoose) and 1 out of 84 canis familiaris (domestic dog). all isolates were characterized by isoen ...199512160424
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